To cite package ‘chemCal’ in publications use:

  Ranke J (2022). _chemCal: Calibration Functions for Analytical
  Chemistry_. R package version 0.2.3.9000, ,
  <https://github.com/jranke/chemcal>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {chemCal: Calibration Functions for Analytical Chemistry},
    author = {Johannes Ranke},
    year = {2022},
    note = {R package version 0.2.3.9000, 
},
    url = {https://github.com/jranke/chemcal},
  }